The effect of Al doping on the sensitivity of SnO2 films prepared by chemical spray pyrolysis

2nd International Scientific Conference (Pure Sciences, Brilliant Creativity and Renewed Building)

Resne, Adeebh L.^1 ; Tariq, Zaynab^1

Ministry of Science and Technology, Iraq^1

关键词: Al-concentration;    Aluminum (Al);    Average particle size;    Chemical spray pyrolysis;    Gas sensitivity;    Glass substrates;    Polycrystalline structure;    Structural;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/571/1/012105/pdf
DOI  :  10.1088/1757-899X/571/1/012105

来源: IOP

【 摘 要 】

In this paper discussed the optical properties of undoped Al (each 3, 5 and 7%) doped SnO2 thin films were synthesized by spray pyrolysis on glass substrate. The samples characterized using X-ray diffraction (XRD) and gas sensitivity. The XRD analysis reveals that the Al dopants substituted into rutile SnO2 nanostructure without forming any secondary phase. The average particle size of the samples was increasing with increasing Al concentration. From XRD and AFM micrograph it was confirmed, the crystallite size in the range of 22.4-34.4 nm. The study reveals polycrystalline structure with prominent peaks. In particular, 7% Al-SnO2 films have a higher sensitivity (30%).